An image processing apparatus configured to generate a panoramic image by combining a plurality of images includes a first acquirer configured to acquire information of a first moving amount of the image based on a common area of the plurality of images, and an aligner configured to align the plurality of images based on difference information between the first moving amount and a second moving amount of the image acquired based on position information of an image-capturing apparatus configured to capture the plurality of images, and information of the second moving amount.